Electrical4U What is a Shunt Resistor? A shunt resistor (or shunt) is defined as a device that creates a low resistance path to force most of the electric current through the circuit to flow through this path. In most cases, a shunt resistor is made up of a material having a low-temperature coefficient of resistance, giving … Read more
What is a Berry Type Transformer? A berry type transformer (or “berry transformer”) is defined as a transformer with a core resembling the spokes of a wheel. Transformers can be classified into three types based on the core design: A berry type transformer is sometimes considered a shell type transformer. However, its unique core design … Read more
What is Ohm’s Law? Ohm’s law states that the electrical current flowing through any conductor is directly proportional to the potential difference (voltage) between its ends, assuming the physical conditions of the conductor do not change. In other words, the ratio of potential difference between any two points of a conductor to the current flowing … Read more
What is a Transformer Connection? The primary and secondary windings of a three-phase transformer can be connected in various ways based on available terminals and the desired application. A three-phase transformer is constructed by three single-phase transformers on separate cores, or on one combined core. But in most cases, the three-phase winding is placed on … Read more
What is Stroboscopic Motion? Stroboscopic motion (also known as the Stroboscopic Effect) is defined as a visual phenomenon that occurs when continuous rotational motion is represented by a series of short samples (as opposed to a continuous view) at a sampling rate close to the period of the motion. A common example of stroboscopic motion … Read more
What is Electrical Resistance? Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). The larger resistance, the greater the barrier against the flow of current. When the potential difference is … Read more
What is Clamping Voltage? Clamping voltage is defined as the maximum voltage allowed through an electrical circuit breaker or surge protector before it limits any further voltage. This technique is used in modern electrical equipment to protect against electrical surges. The clamping voltage is a predefined voltage for a surge protector. The surge protector will … Read more
What is a Dead Short? A dead short is an electrical circuit that results in current flowing along an unintended path with no resistance or impedance. This results in an excessive current flowing through the circuit, which can damage equipment or cause electrical shocks to those nearby. Tracking and diagnosing a dead short is challenging … Read more
What is a Latching Relay? A latching relay (also known as a bistable, keep, impulse, stay relay, or simply a “latch”) is defined as a two-positional electromechanical switch. It is an electrically actuated switch used to maintain its position without power applied to the coil. A latching relay is used to control the large flow … Read more
What is Rise Time? Rise time is defined as the time taken for a signal to cross from a specified low value to a specified high value. In analog and digital electronics, the specified lower value and specified higher value are 10% and 90% of the final or steady-state value. So the rise time is … Read more